diff --git a/litellm/integrations/custom_logger.py b/litellm/integrations/custom_logger.py
index 22e2e34c586..900685f556a 100644
--- a/litellm/integrations/custom_logger.py
+++ b/litellm/integrations/custom_logger.py
@@ -914,9 +914,9 @@ class CustomLogger:  # https://docs.litellm.ai/docs/observability/custom_callbac
             return model_call_details
 
         redacted_model_call_details: Final = (
-            {
+            {  # mutable-ok: callback payload copy
                 **model_call_details,
-                "messages": [{"role": "user", "content": REDACTED_BY_LITELLM}],
+                "messages": [{"role": "user", "content": REDACTED_BY_LITELLM}],  # mutable-ok: callback payload copy
                 "prompt": "",
                 "input": "",
             }
diff --git a/litellm/litellm_core_utils/litellm_logging.py b/litellm/litellm_core_utils/litellm_logging.py
index da805ce77e1..c9dc1d49a36 100644
--- a/litellm/litellm_core_utils/litellm_logging.py
+++ b/litellm/litellm_core_utils/litellm_logging.py
@@ -3194,18 +3194,18 @@ class Logging(LiteLLMLoggingBaseClass):
                         )
 
                 if isinstance(callback, CustomLogger):  # custom logger class
-                    callback_model_call_details: Final[dict] = self.model_call_details
+                    callback_model_call_details: Final[dict] = self.model_call_details  # mutable-ok: callback payload API
                     ##################################
                     # call redaction hook for custom logger
-                    standard_redacted_model_call_details: Final[dict] = (
+                    standard_redacted_model_call_details: Final[dict] = (  # mutable-ok: callback payload API
                         callback.redact_standard_logging_payload_from_model_call_details(
                             model_call_details=callback_model_call_details
                         )
                     )
-                    streaming_redacted_model_call_details: Final[dict] = redact_streaming_responses_for_custom_logger(
+                    streaming_redacted_model_call_details: Final[dict] = redact_streaming_responses_for_custom_logger(  # mutable-ok: callback payload API
                         model_call_details=standard_redacted_model_call_details, custom_logger=callback
                     )
-                    redacted_model_call_details: Final[dict] = redact_model_call_details_for_custom_logger(
+                    redacted_model_call_details: Final[dict] = redact_model_call_details_for_custom_logger(  # mutable-ok: callback payload API
                         model_call_details=streaming_redacted_model_call_details, custom_logger=callback
                     )
                     ##################################
@@ -4291,7 +4291,7 @@ def _construct_custom_logger_compatible_class(
     logging_integration: _custom_logger_compatible_callbacks_literal,
     internal_usage_cache: DualCache | None,
     llm_router: Any | None,  # expect litellm.Router, but typing errors due to circular import
-    custom_logger_init_args: dict | None = None,
+    custom_logger_init_args: dict | None = None,  # mutable-ok: callback constructor API
 ) -> CustomLogger | None:
     try:
         custom_logger_init_args = custom_logger_init_args or {}
diff --git a/litellm/litellm_core_utils/redact_messages.py b/litellm/litellm_core_utils/redact_messages.py
index e2bdeb2cb17..fa216c53faa 100644
--- a/litellm/litellm_core_utils/redact_messages.py
+++ b/litellm/litellm_core_utils/redact_messages.py
@@ -75,7 +75,9 @@ def redact_response_for_custom_logger(result: object, custom_logger: CustomLogge
     )
     if not opted_out or custom_logger.redacts_messages_itself():
         return result
-    return perform_redaction(model_call_details={}, result=result, redact_streaming_responses=False)
+    return perform_redaction(  # mutable-ok: redaction scratch payload
+        model_call_details={}, result=result, redact_streaming_responses=False
+    )
 
 
 def redact_model_call_details_for_custom_logger(
@@ -93,11 +95,11 @@ def redact_model_call_details_for_custom_logger(
         raw_request_typed_dict.get("raw_request_body") if isinstance(raw_request_typed_dict, dict) else None
     )
     redacted_raw_request_typed_dict: Final = (
-        {
+        {  # mutable-ok: callback payload copy
             **raw_request_typed_dict,
             "raw_request_body": {
-                **raw_request_body,
-                "messages": [{"role": "user", "content": REDACTED_BY_LITELLM}],
+                **raw_request_body,  # mutable-ok: callback payload copy
+                "messages": [{"role": "user", "content": REDACTED_BY_LITELLM}],  # mutable-ok: callback payload copy
                 "input": "",
                 "prompt": "",
             },
@@ -105,15 +107,15 @@ def redact_model_call_details_for_custom_logger(
         if isinstance(raw_request_typed_dict, dict) and isinstance(raw_request_body, dict)
         else raw_request_typed_dict
     )
-    return {
+    return {  # mutable-ok: callback payload copy
         **model_call_details,
-        **{
+        **{  # mutable-ok: callback payload copy
             key: redact_response_for_custom_logger(result=model_call_details[key], custom_logger=custom_logger)
             for key in response_keys
             if model_call_details.get(key) is not None
         },
         **(
-            {"raw_request_typed_dict": redacted_raw_request_typed_dict}
+            {"raw_request_typed_dict": redacted_raw_request_typed_dict}  # mutable-ok: callback payload copy
             if redacted_raw_request_typed_dict is not raw_request_typed_dict
             else {}
         ),